Cotton gin



Jan. 8 1924. 1,480,054

, e. E. EVANS COTTON-GIN Original Filed Feb. 26. 1923 Patented Jan. 8, 1924..

siren GEORGE E. EVANS, OF WACO, TEXAS.

COTTON GIN.

Original application filed March 13, 1922, Serial No. 543,253. Divided and this application filed February 26, 1923.

To all whom it may concern:

Be it known that I, GEORGE E. EVANS, citizen of the United States of America, residing at l aco, in the county of McLennan and State of Texas, have invented certain new and useful Improvements in Cotton Gins, of which the following is a specification.

This invention relates to new and useful improvements in air blast gins.

In gins of this type lint cotton and bits of leaves, seed hulls and other trash known as motes are carried through the saw spaces between the ribs from the roll box. The lint cotton is removed by air nozzles and deflected into a cotton flue from the saws, while the motes are thrown off and collected in a conveyer trough. The mouth of the nozzle is generally located at a point best suited to remove the lint and centrifuforce or gravity is relied upon to take care of the motes. lVith the best of engineering skill no flue has yet been designed which will not take more or less motes into its mouth. Motes in the lint cotton which reaches the condenser is undesirable and if eliminated, a higher grade of cotton would be produced.

The object of the invention is to so locate the mouth of the air flue as to not only give the saws a full opportunity to cast off their motes, but to prevent trash and other foreign matter from falling into the mouth of the flue.

A further object is to provide a gin structure in which the peripheries of the saws are free from obstructions from the point where they pass between the ribs to the mouth of the air flue.

Another object of the invention is to amplify the peripheral distance from the point where the saws pass between the ribs to the mouth of the air flue, thus giving the saws a greater opportunity to demote. By means of this amplified spacing it is possible to run the saws at a comparatively slow speed, whereby moting is more efiiciently carried out and a cleaner staple is produced. This is desirable even though it reduces the capacity of the gin.

A construction designed to carry out the invention together with other features will be hereinafter described.

The invention will be more readily understood from a reading of the following speci- Serial No. 621,442.

fication and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is a vertical sectional view of a gin constructed in accordance with my invention, and I Fig. 2 is a similar view of a modified form.

Inthe drawings the numeral 10 designates an ordinary ginning roll box, 11 the huller roll box, 12 the hullerribs, 13 the ginning ribs and is the saws of the saw cylinder. The saws are spaced apart by space blocks or spacers 15 which are of the usual construction new in common use. are of standard construction and are not elements of the invention.

Beneath the saw cylinder an air flue 16 extends longitudinally of the'gin and is sup plied with air under pressure in a suitable manner. At its upper-end the air flue is equipped with a nozzle 17 arranged in close relationto the teeth of the saws and preferably tangential thereto, so as to direct the air along said teeth in a clockwise direction, in which direction said saws revolve.

The nozzle is contiguous to a relatively wide mouth 18 at the top of a lint flue 19 which extends down the front side of the air flue proper. The saws dip into this mouth and the lint cotton is discharged directly into thesame so that said lint is'readily displaced into the lint flue. The term air flue may be used as designating the parts 16 to 19 inclusive, as a unit.

It is important that the mouth 18 be located in its entirety under the space blocks 15 and thus dirt or other extraneous matter, falling by gravity, cannot enter said mouth and enter the air flue. Further matter falling upon the space blocks will not be deflected into themouth of the flue, but will be diverted therefrom. This arrangement makes for a cleaner staple.

By observing the drawing it will be seen that the saws will traverse nearly a half revolution from the point where the lint is drawn between the ribs to the mouth of the air flue. This increased distance or amplification over the usual practice, gives the saws a greater opportunity and a longer period, in which to cast off the motes thru the agency of centrifugal force. Further by having the peripheries of the saws, between the points above mentioned, free from These parts obstructions the motes cannot collect or interfere with the operation of the gin. The construction herein presented enables the saws to be run at a slower speed than is usually employed, thus giving a better opportunity for moting, and while the capacity of the gin may be slightly reduced, the gain in clean cotton more than compensates any such loss.

A conveyor 20 is arranged longitudinally of the gin in the :bottom of a trough 21 and relatively below the space blocks. There is no obstruction at the upper end of the trough and the motes which are displaced from the saws are cast directly into the trough. Any obstruction which would tend to collect motes or dirt in proximity to the saws, would be objectionable and would tend to soil the cotton.

In Fig. 2 l have shown a modifiedi orm in which a second cylinder of saws 14 is arranged abovethe usual cylinder and project into the top of the roll box 10. The saws are separated by space blocks 15, and directly under the same is the mouth 18 of an air fluecomprising an air supply flue 16'. a nozzle 17' and a lint flue 19. A trough 321 is provided relatively below the space blocks 15 and has therein a conveyor 20. The upper saws have even a greater portion of their peripheries lying between the point where the lint is drawn between the ribs and the mouth of the iiue. ii toting will be veryeiiiciently carried out by the upper saws andthe double saw construction will greatly enhance ginning.

This application is a division of my application liled March 13th, 1922,:SerialNumber 548,253 and all disclosures are included herein.

Whil it is possible to operate the saws at a slower speed than is usually employed, it is to be understood that any desirable and practical speed may be used and the same speeds which are now commonly used may be employed.

What I claim, is:

1. In an air blast cotton gin, a saw cylinder having circular saws and space blocks between the saws, and anair flue having its mouth under the-space blocks, whereby dirt and extraneous matter falling by gravity are deflected from the mouth of the flue by said space blocks.

2. in an air blast cotton gin, a roll box, ribs in the roll box, a saw cylinder having its saws passing between the ribs, an air flue having its mouth contiguous to the teeth of the saws and at a location remote from the point where the saws pull the lint between the ribs, a nozzle adjacent the mouth of the flue, and a lint flue contiguous to the mouth for receiving the lint deflected from the saws by the nozzle into the mouth, there being no obstructions or elements adjacent the peripheries of the saws between the points where the lint is drawn thru the ribs and the mouth or" the flue.

3. in an air blast cotton gin, a roll boX, ribs in the roll box, a saw cylinder having its saws passing between the ribs, space blocks between the saws of the cylinder, an air flue having its mouth contiguous to the teeth of the saws and at a location remote from the point where the saws pull the lint between the ribs, a nozzle adjacent the mouth oi the line, a lint flue contiguous to the mouth for receiving the lint deflected from the saws by the nozzle into the mouth, and a mote conveyor located relatively below the space blocks and removed from the saws.

4. In an air blast cotton gin, a roll box, ribs in the roll box, a saw cylinder having its saws passing between the ribs, space blocks between the saws ot the cylinder, and an air line having its mouth directly under the space blocks of the cylinder and at a point located substantially one-half the circumference of the cylinder from the point where the lint passes thru the ribs.

5. In an air blast cotton gin, a roll box, ribs at one side of the box, an upper saw cylinder, a lower saw cylinder, the saws oi the cylinders projectingbetween the ribs into the upper and lower portions of the roll box, air flues having their mouths under the ce tral portions of the cylinders, and nozzles adjacent the mouths of said iues for discharging the lintthereinto, whereb dirt and extraneous matter falling by gravity are deflected from the mouths of the lines.

In testimony whereof I ailix my signature GEORGE E. EVANS. 

